x86/mm/ioremap.c

44 int ioremap_change_attr(unsigned long vaddr, unsigned long size,
47 	unsigned long nrpages = size >> PAGE_SHIFT;
155 static void __ioremap_check_mem(resource_size_t addr, unsigned long size,
161 	end = start + size - 1;
172  * the physical address is aligned by a huge page size (1GB or 2MB) and
173  * the requested size is at least the huge page size.
184 __ioremap_caller(resource_size_t phys_addr, unsigned long size,
190 	const unsigned long unaligned_size = size;
198 	/* Don't allow wraparound or zero size */
199 	last_addr = phys_addr + size - 1;
200 	if (!size || last_addr < phys_addr)
210 	__ioremap_check_mem(phys_addr, size, &io_desc);
226 	size = PAGE_ALIGN(last_addr+1) - phys_addr;
234 	retval = memtype_reserve(phys_addr, (u64)phys_addr + size,
242 		if (!is_new_memtype_allowed(phys_addr, size, pcm, new_pcm)) {
246 				(unsigned long long)(phys_addr + size),
292 	area = get_vm_area_caller(size, VM_IOREMAP, caller);
298 	if (memtype_kernel_map_sync(phys_addr, size, pcm))
301 	if (ioremap_page_range(vaddr, vaddr + size, phys_addr, prot))
318 	memtype_free(phys_addr, phys_addr + size);
325  * @size:      size of the resource to map
343 void __iomem *ioremap(resource_size_t phys_addr, unsigned long size)
355 	return __ioremap_caller(phys_addr, size, pcm,
363  * @size:      size of the resource to map
384 void __iomem *ioremap_uc(resource_size_t phys_addr, unsigned long size)
388 	return __ioremap_caller(phys_addr, size, pcm,
396  * @size:	size of the resource to map
403 void __iomem *ioremap_wc(resource_size_t phys_addr, unsigned long size)
405 	return __ioremap_caller(phys_addr, size, _PAGE_CACHE_MODE_WC,
413  * @size:	size of the resource to map
420 void __iomem *ioremap_wt(resource_size_t phys_addr, unsigned long size)
422 	return __ioremap_caller(phys_addr, size, _PAGE_CACHE_MODE_WT,
427 void __iomem *ioremap_encrypted(resource_size_t phys_addr, unsigned long size)
429 	return __ioremap_caller(phys_addr, size, _PAGE_CACHE_MODE_WB,
434 void __iomem *ioremap_cache(resource_size_t phys_addr, unsigned long size)
436 	return __ioremap_caller(phys_addr, size, _PAGE_CACHE_MODE_WB,
441 void __iomem *ioremap_prot(resource_size_t phys_addr, unsigned long size,
444 	return __ioremap_caller(phys_addr, size,
543 					  unsigned long size)
551 	is_pmem = region_intersects(phys_addr, size, IORESOURCE_MEM,
572 	switch (e820__get_entry_type(phys_addr, phys_addr + size - 1)) {
596 				 unsigned long size)
635 				   unsigned long size)
696 						unsigned long size)
704 		unsigned int len, size;
715 		size = sizeof(*data);
726 			size += len;
728 			data = early_memremap_decrypted(paddr, size);
742 		early_memunmap(data, size);
758 bool arch_memremap_can_ram_remap(resource_size_t phys_addr, unsigned long size,
771 		if (memremap_is_setup_data(phys_addr, size) ||
772 		    memremap_is_efi_data(phys_addr, size))
776 	return !memremap_should_map_decrypted(phys_addr, size);
786 					     unsigned long size,
797 		if (early_memremap_is_setup_data(phys_addr, size) ||
798 		    memremap_is_efi_data(phys_addr, size))
802 	if (encrypted_prot && memremap_should_map_decrypted(phys_addr, size))
809 bool phys_mem_access_encrypted(unsigned long phys_addr, unsigned long size)
811 	return arch_memremap_can_ram_remap(phys_addr, size, 0);
816 				      unsigned long size)
818 	return early_memremap_prot(phys_addr, size, __PAGE_KERNEL_ENC);
826 					 unsigned long size)
830 	return early_memremap_prot(phys_addr, size, __PAGE_KERNEL_ENC_WP);
835 				      unsigned long size)
837 	return early_memremap_prot(phys_addr, size, __PAGE_KERNEL_NOENC);
845 					 unsigned long size)
849 	return early_memremap_prot(phys_addr, size, __PAGE_KERNEL_NOENC_WP);